Ex-state Senate majority leader ​D​ean Skelos’ son Adam ​threatened his supervisor at the ​job arranged by his dad​,​ “I’ll smash your f—–g head in” if he gave him any more grief about not showing up for work, the ​manager testified on Wednesday.

Chris Curcio, Adam​ Skelos​’ supervisor at the medical ​malpractice ​insurance firm PRI, said the threat came after he got Adam, 33, on the phone and confronted him about his repeated absences
“Guys like you couldn’t shine my shoes. You’ll never amount to anything. If you talk to me like that again, I’ll smash your f—–g head in,” Adam raged, according to Curcio.

He then told his own supervisor, ​​Carl Bonomo, about his problems with Adam and Bonomo replied, “We’ll figure something out.”

Adam was then promoted to a consultant at PRI, Curcio testified.

Carl Bonomo also told Curcio at one point, “Give him some space. We understand he has a sick child at home.”

Curcio kept a handwritten log as to when Adam was a no-show at work. Adam had told him he had an “arrangement” with company CEO Anthony Bonomo that he’d only work two days a week.

Adam would write on his weekly time sheets that he worked 9-5 p.m. Curcio refused to sign off on them, only putting “ok.”

“It was frustrating trying to manage him,” Curcio said.

“Was it fair to say you didn’t get along because of work performance?” asked prosecutor Tatiana Roesler Martins.

“It was work performance, yes,” Curcio answered.

Adam’s attorney Christopher Conniff tried to make a point that Curcio only got his job at PRI because his mom talked to his uncle, Anthony, even though Curcio had no experience when he started.

But Martins countered on redirect examination: “Is your mother an elected official, Mr. Curcio?” “No,” he responded. “Is she the senate majority leader?” “No,” he said, as the courtroom audience chuckled.

Dean Skelos was the state’s most powerful Republican when he was busted in May on charges he illegally pressured companies to support his son in return for support on legislation affecting their businesses. He quit his leadership post but retained his Senate seat.

Prosecutors said Dean Skelos arranged for his son to receive more than $300,000 through bribes, gratuities and extortion payments from a major real estate developer, an environmental technology company and PRI. They also said Dean Skelos sought ways to funnel money to his son after promising to help him raise money for a $675,000 home with a pool for his family in 2012.